Economists are outdoing each other with ever more curious instruments, ranging from lethal mosquitoes to heirless maharajahs, or, most recently, wind speeds and sea currents.

經(jīng)濟(jì)學(xué)家們正致力于使用更加稀奇的工具來斗法，這些工具從致命蚊子到無嗣的印度土邦主91精品自在拍精选久久，或是近期的風(fēng)速精品久久久久久电影、洋流等無所不包。

In cold fog system with the water out of pesticides, it can raise insecticidal, mosquitoes and flies.

在冷霧系統(tǒng)噴出的純凈水中加入適當(dāng)劑量的殺蟲劑免费看的黄色视频，能夠起到殺蟲99riav1com、防蚊蠅的效果。

Methods iv instar larve of cx.pipiens pallenswere treated with propoxur at the dose of lc 50 in each generation and remaining survival larrae were fed under laboratory conditions.who bioassay was employed for detection of resistance of mosquitoes.

在實(shí)驗(yàn)室條件下日韩成年黄网站视频，用殘殺威以lc 50 的劑量處理iv齡幼蟲欧美在线1区，選育殘殺威抗性品系。按照who生物測定法最新国产91自拍，測定抗殘殺威品系對(duì)多種殺蟲劑的敏感性超级碰免费。

Dr Marka has created a curtain of invisible light that mosquitoes cannot penetrate.

馬卡博士發(fā)明了一種蚊子無法穿越的不可見光簾。

Dr Marka has created a curtain of invisible light that mosquitoes cannot penetrate.

馬爾卡博士創(chuàng)造了一種蚊子不能穿過的不可視光簾幕欧美不卡三级视屏。

Dr Marka has created a curtain of invisible light that mosquitoes cannot penetrate.

Marka博士發(fā)明了一種蚊子無法穿透的不可見光光幕日本、乱论、欧美、国产。

Dr Marka calculates that if there is a 6% chance that a mosquito will penetrate a light curtain, and a hut contains four curtains, then only one in 100,000 mosquitoes will be able to spread malaria.

馬卡博士計(jì)算出如果一只蚊子有6%的機(jī)會(huì)穿越一道光簾，那么在一間裝有4道光簾的屋子內(nèi)你懂得福利影院，100黄色自慰在线网站，000只蚊子中只有一只能傳播瘧疾。

Dr Marka envisages two or three light curtains in a home: one at the door, one around a sleeping person and one surrounding the area in which mosquitoes typically hide (under the thatched roof of a hut, for example).

馬爾卡博士設(shè)想在一個(gè)房間里有兩到三道光簾幕：一道在門口又长又大又粗又硬黄色网站，一道在熟睡的人周圍還有一道在有蚊子隱藏的典型區(qū)域周圍（比如久久国产精品首页久久久精品，茅草屋的屋頂下面）。

Dr Marka calculates that if there is a 6% chance that a mosquito will penetrate a light curtain, and a hut contains four curtains, then only one in 100,000 mosquitoes will be able to spread malaria.

馬爾卡博士估算假如一只蚊子有6%的機(jī)會(huì)穿過光簾幕欧美性爱一级黄，并且一個(gè)草屋設(shè)有四道簾幕欧美性爱在线视频一区二区，那么在一百萬只蚊子中僅有一只有機(jī)會(huì)能夠傳播瘧疾。

Dr Marka calculates that if there is a 6% chance that a mosquito will penetrate a light curtain, and a hut contains four curtains, then only one in 100,000 mosquitoes will be able to spread malaria.

Marka博士預(yù)測男人的天堂无码视频，如果蚊子穿過一道光幕的概率為6%亚洲一级视频，那么對(duì)一所安裝了四道光幕的茅草屋來說，蚊子能傳播瘧疾的概率僅為十萬分之一欧洲黄色三级片高清无码。